We found out yesterday too about the emergency recals, but the only information so far is Cummins engines only. Navistar engines are suppose to be allowed too. We did hear that all manufactures requested this a while ago but it was the EPA and CARB that kept saying "NO!" I guess the Cummins ones will be ready next week sometime and will require a Fleet count. DEF MUST STILL BE USED. This only takes out the derates, read the PDF QualityTruck posted. In Navistar trucks, the body controller may also have to be reprogrammed to turn off the warning beeper for the DEF gauge.
International DEF Sensor
Discussion in 'International Forum' started by Vincent5309, Jul 2, 2021.
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Another Canadian driver, avgdzlmekanic and QUALITYTRUCK Thank this.
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also the success rate of the calibration seems to be in question.Another Canadian driver Thanks this. -
yeah im just not dealing with the crap anymore. My trucks getting deleted. It will be finally finished today.
Another Canadian driver Thanks this. -
I found one qls for $4500 , people are just evil , taking advantage of us in bad times.. We need help with this one . Someone suggest what to do .. I am down from 3 months
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@Heavyd after you do the recalibration, what exactly is the truck showing on the dash? I recalibrated an ECM and now I’m getting an SCR fault and a derate message on the dash. The red check engine light, yellow triangle light with a wrench, and a beeping noise is going off. Is this part of the calibration?
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Another Canadian driver and Heavyd Thank this.
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Ok, the recalibration only deals with codes 3868, 4572 and 4677. With failed QLS that log those codes, the ECM will still log it, but will not broadcast it to the dash and will not derate. So if you are getting warning lights the system must be logging other codes. IMPORTANT!!! The system still needs DEF to work. The aftertreatment will still inject DEF like normal. So this must be maintained. The system still needs to be able to prime up. The ECM now uses ambient air temp for tank temp and the ECM uses NOx conversion efficiency to determine DEF quality. To help you further, what codes are you logging, what ECM calibration code did you originally have and what did you calibrate it to?
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Another Canadian driver Thanks this.
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